JPH0811950A - Packaging bag for wet tissue paper - Google Patents

Abstract

PURPOSE:To prevent the opening from being covered again when a sealing member is returned to the original position by its restoring force after the sealing member which covers the opening of a packaging bag is peeled. CONSTITUTION:A sealing member 36 is bonded on an upper surface 32 so that an opening 34 which is formed on the upper surface 32 of a packaging bag 30 may be covered. One end of the sealing member 36 is folded to the outside to form a handle part 38. On the rear surface 38A of the handle part 38, a self-adhesive substance is applied, and the handle part 38 is bonded to the sealing member 36. At the time of usage, the handle part 38 is pulled to remove the handle part 38 from the sealing member, and then, the sealing member 36 is peeled from the upper surface 32, and the opening 34 is exposed. Then, the handle part 38 is adhered to an end of the packaging bag, which is opposite from the end part wherein the handle part 38 is provided, by the self-adhesive substance being applied on the rear surface 38A to prevent the sealing member from returning to the original position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag for enclosing a sheet material, and more particularly to a packaging bag sheet material comprising a liquid impermeable material for enclosing wet tissue paper or other wet sheet material. Regarding the structure of the outlet.

[0002]

2. Description of the Related Art Wet type tissue paper (hereinafter simply referred to as "wet tissue paper") obtained by impregnating a sheet material such as non-woven fabric with a drug or other liquid substance.
Is widely used for cleaning dirt on limbs and mouth, cleaning up after meals for infants and wiping after defecation.

In the past, such wet tissue paper was often used as a refill type. That is, it is impermeable to liquids such as plastic, and
A container made of highly rigid material and having a lid that opens wide is prepared in advance, and the hermetically-sealed wet tissue paper for refilling is taken out by breaking the package and used by packing it in a plastic container each time. there were.

However, such a refill type is not preferable because it takes a lot of time to refill and the wet tissue paper may become dirty at the time of refilling. Therefore, recently, a disposable type is used. It is designed to be used.

An example of such a disposable wet tissue paper is disclosed in Japanese Utility Model Laid-Open No. 5-81083. FIG. 10 is a schematic diagram showing the outline. An elliptical perforation 14 is formed on the wet tissue paper take-out surface 12 of the packaging bag 10 in which the wet tissue paper (not shown) folded inside is enclosed. After that, the perforations 14 are broken and the opening 16 for taking out the wet tissue paper is formed. A seal member 18 is adhered on the wet tissue paper take-out surface 12 so as to cover the entire elliptical perforation 14. The back surface of the seal member 18 is coated with an adhesive substance on one surface thereof, and the seal member 18 has a region inside the perforations 14 (hereinafter,
14A and the area 20 outside the perforations 14 is adhered to the wet tissue paper removal surface 12.

A knob piece 22 is provided at the tip of the seal member 18, and when the wet tissue paper sealed in the packaging bag 10 is to be taken out,
Grasp the knob piece 22 and pull the seal member 18 in the direction of arrow X. Since the seal member 18 is firmly adhered to the wet tissue paper take-out surface 12 in the break area 14A, the wet tissue paper take-out surface 12 is pulled along with the pulling of the seal member 18 in the direction of the arrow X.
Breaks along the perforations 14. In this way, the opening 16 is formed, and the wet tissue paper inside the packaging bag 10 can be taken out through the opening 16.

[0007]

When the wet tissue paper take-out surface 12 is fractured along the perforations 14, both the seal member 18 and the fracture area 14A are fractured while being bent, so that the seal member 18 is broken. The break area 14A (ie, the wet tissue paper removal surface 12) generally needs to be formed from a flexible material. For this reason, the wet tissue paper take-out surface 12 is once pulled in the direction of the arrow X, and the perforation 14
Even if it is broken along the line, a restoring force for returning to the original state acts on the broken region 14A, and the broken region 14A may return together with the seal member 18 in the direction of the arrow Y opposite to the arrow X.

Fracture region 1 on the back surface of the seal member 18
Since the adhesive substance is applied to the region 20 outside the 4A, when the seal member 18 returns in the direction of the arrow Y, the adhesive substance on the back surface of the seal member 18 adheres to the wet tissue paper removal surface 12 again. In some cases, the opening 16 was blocked. Alternatively, the sealing member 18 sometimes adheres to the hand when the wet tissue paper is taken out, or adheres to the wet tissue paper taken out, and thus the handling of the packaging bag has not always been convenient.

The present invention has been made in order to solve the above problems in the conventional packaging bag, and after pulling the seal member that has closed the opening of the packaging bag to open the opening, An object of the present invention is to provide a packaging bag in which the sealing member returns to its original position due to its restoring force and does not hinder the removal of the contents of the packaging bag.

[0010]

To achieve this object, the packaging bag according to the first aspect of the present invention is a sheet material take-out formed on the take-out surface of the sheet material enclosed inside. Opening and a sealing member having a back surface coated with a first adhesive substance and detachably attached to the sheet material taking-out surface so as to cover the opening, and the removal of the sealing member. And a handle portion provided at a side end portion. The grip portion is formed by folding the tip end portion of the seal member outward toward the direction of removing the seal member, and the back surface of the folded portion is coated with a second adhesive substance and is folded back. The closed portion is detachably attached to the surface of the seal member.

In the packaging bag of the second aspect according to the present invention, an easily rupturable line for forming an opening for taking out the sheet material is provided on the taking-out surface of the sheet material enclosed inside. A sealing member having a back surface coated with a first adhesive substance and detachably attached to the sheet material taking-out surface so as to cover the portion surrounded by the line, and the sealing member. And a grip portion provided at the end portion on the detaching side. The grip portion is formed by folding the tip end portion of the seal member outward toward the direction of removing the seal member, and the back surface of the folded portion is coated with a second adhesive substance and is folded back. The closed portion is detachably attached to the surface of the seal member.

First, by gripping the handle portion and pulling the handle portion upward, the folded-back portion adhered to the surface of the seal member by the second adhesive substance is peeled off from the seal member. Further, the seal member is pulled while holding the grip portion, and the seal member adhered to the sheet material take-out surface is peeled off by the first adhesive substance to form an opening in the sheet material take-out surface (first In the packaging bag of the aspect, the opening appears only by pulling and peeling off the sealing member.In the packaging bag of the second aspect, when the sealing member is pulled,
The sheet material take-out surface is broken along a line that is easy to break, and an area surrounded by the line is opened).

Next, the grip portion is further pulled, and the grip portion is attached to the sheet material take-out surface in the vicinity of substantially the end portion through the second adhesive substance applied to the back surface of the grip portion. As a result, even if a restoring force is applied to the grip portion, the grip portion remains attached to the sheet material taking-out surface, and therefore the grip portion does not return toward the opening of the sheet material taking-out surface. , It does not become an obstacle when taking out the sheet material enclosed in the packaging bag.

In a preferred embodiment of the present invention, the handle portion is formed integrally with the seal member.

The handle portion may be formed by being formed separately from the seal member and then being joined to the seal member. However, by forming the handle portion integrally with the seal member from the beginning,
The step of connecting the handle portion and the seal member can be omitted, and the productivity of the seal member and the handle portion can be improved.

In a preferred embodiment of the present invention, the second adhesive substance is applied only to a part of the back surface of the handle portion.

This makes it possible to reduce the amount of application of the second adhesive substance.

Particularly, it is preferable that the second adhesive substance is applied only to a substantially half region including the folding line on the back surface of the handle portion.

That is, in the handle portion, the second adhesive substance is not applied to the front half region, but the second adhesive substance is applied only to the proximal half region, that is, the half region including the folding line. To be done. This makes it possible to use the tip-side half of the grip portion as a small piece for pinching the grip portion, which makes it easier to grip the grip portion.

In a preferred embodiment of the present invention, the adhesive force of the second adhesive substance to the seal member of the handle portion is set to be smaller than the adhesive force of the first adhesive substance to the take-out surface of the seal member. To be done.

It is assumed that the adhesive force of the second adhesive substance that adheres the handle portion to the seal member is set to be larger than the adhesive force of the first adhesive substance that adheres the seal member to the sheet material take-out surface. Then, when the grip portion is pulled, the seal member is peeled off from the sheet material take-out surface before the grip portion is peeled off from the seal member, so that the grip portion cannot be peeled off from the seal member. Therefore, by setting the adhesive force of the second sticky substance to be smaller than the adhesive force of the first sticky substance, when the handle part is pulled, the handle part first has a sealing member. Then, the seal member is peeled off from the sheet material take-out surface, and the handle portion can be effectively used.

A substance different from the second adhesive substance can be used as the first adhesive substance, but it is more convenient to use the same substance for both in the manufacturing process of the packaging bag. When both are made of the same substance, naturally, both have the same adhesive force per unit area. Therefore, in order to satisfy the above condition that the adhesive force of the second adhesive substance is smaller than the adhesive force of the first adhesive substance, the area of the part to which the second adhesive substance is applied is May be smaller than the area of the portion to which the first adhesive substance is applied.

When the first adhesive substance and the second adhesive substance are different substances, the adhesive force of the second adhesive substance is smaller than the adhesive force of the first adhesive substance. In order to satisfy the above condition, the following equation should be satisfied. (Adhesive force per unit area of the first adhesive substance) x (Area to which the first adhesive substance is applied)> (Adhesive force per unit area of the second adhesive substance) x (Second Area where the adhesive substance is applied)

In a preferred embodiment of the present invention, a wet sheet material is used as the sheet material and a packaging bag made of a liquid impermeable material is used.

That is, the packaging bag according to the present invention can be applied to not only wet type tissue paper but also so-called dry type tissue paper and other wipes. However, it is most preferable to apply it to wet type tissue paper.

[0026]

1 to 4 show a first embodiment of a packaging bag according to the present invention.

The packaging bag 30 according to the first embodiment is a hermetically sealed bag made of a flexible liquid-impermeable plastic film material. The surface of the packaging bag 30 is a smooth surface. Therefore, as will be described later, it is possible to repeatedly attach and detach the adhesive substance to the surface of the packaging bag 30. Inside the packaging bag 30, a plurality of folded wet tissue papers (not shown) are enclosed in a stacked state.

The wet tissue paper is made of non-woven fabric made of pulp, cotton, synthetic fiber or the like, paper made of natural pulp or synthetic pulp, or cloth such as gauze or other sheet material having wet resistance. , Liquid components such as water, alcohol, fragrances, lotions, drugs, and surfactants, and other solutions.

An elliptical opening 34 for taking out the tissue paper from the inside of the packaging bag 30 is formed on the tissue paper take-out surface 32 which is the upper surface of the packaging bag 30.

A seal member 36 having a larger area than the opening 34 is provided on the tissue paper take-out surface 32.
Is installed. Like the packaging bag 30, the sealing member 36 is also made of a flexible and liquid-impermeable plastic film material. The first sticky substance (or pressure-sensitive adhesive; hereinafter the same; not shown) is applied over the area A to the outer peripheral portion of the back surface of the sealing member 36, that is, the portion outside the opening 34, and the sealing member 36 is It is adhered to the tissue paper take-out surface 32 so as to cover the opening 34 via the first adhesive substance. In addition,
The sealing member 36 is fixed on the tissue paper take-out surface 32 by means of heat sealing, high frequency sealing, ultrasonic sealing, adhesive or the like at the end 36A opposite to the end where the grip 38 is provided, which will be described later. Therefore, it does not come off from the tissue paper take-out surface 32.

At one end of the seal member 36, a handle portion 38 is formed integrally with the seal member 36. The handle portion 38 is formed by folding a portion having a predetermined length outward from one end of the seal member 36, and the handle portion 3 is formed.
The second sticky substance (or pressure sensitive adhesive; the same applies hereinafter; not shown) is applied to the entire back surface 38A of the No. 8 back surface 38A. The handle portion 38 is held in a state of being adhered to the upper surface of the seal member 36 via the second adhesive substance.

The method of using the packaging bag 30 according to the first embodiment will be described below.

First, in the state shown in FIG. 1, the handle portion 38 is pulled in the direction of the arrow X1, and the handle portion 38 is peeled off from the seal member 36. In this case, if the adhesive force of the handle portion 38 with respect to the seal member 36 is larger than the adhesive force of the seal member 36 with respect to the tissue paper take-out surface 32, the handle portion 38 will be peeled off from the seal member 36 when the handle portion 38 is pulled. Since the seal member 36 is peeled off from the tissue paper taking-out surface 32 before, the adhesive force of the grip portion 38 to the seal member 36 is the same as that of the tissue paper taking-out surface 3 of the seal member 36.
It is set to be smaller than the adhesive force for 2. That is, when the adhesive force per unit area of the first adhesive substance is F1, the adhesive force per unit area of the second adhesive substance is F2, and the area of the back surface 38A of the handle portion 38 is A2,
F1, F2, A (area on which the first adhesive substance is applied) and A2 are defined so that the following formula is established. F1 x A> F2 x A2

Next, as shown in FIG. 2, after the handle portion 38 is peeled off from the seal member 36, the handle portion 3 is further removed.
8 is pulled in the direction of arrow X2, that is, in the direction of the opposite end of the packaging bag 30.

By this tension, as shown in FIG. 3, the seal member 36 is gradually peeled off from the tissue paper take-out surface 32, and the opening 34 begins to appear.

As shown in FIG. 4, the seal member 36 is pulled until the opening 34 is fully exposed and peeled off from the tissue paper take-out surface 32, and then the back surface 3 of the handle portion 38 is removed.
The handle portion 38 is adhered onto the tissue paper take-out surface 32 via the second adhesive substance applied to 8A.

Since the seal member 36 is made of a flexible material, when the seal member 36 is peeled off from the tissue paper take-out surface 32 in a bent state, a restoring force acts on the seal member 36, and the seal member 36 I try to return to my original position. However, in this embodiment, since the seal member 36 after being peeled off from the tissue paper take-out surface 32 is re-bonded to the tissue paper take-out surface 32 via the second adhesive substance on the back surface 38A of the handle portion 38, the seal member 36 is sealed. Even if the restoring force for returning to the original position acts on the member 36, the restoring force is canceled by the adhesive force of the second adhesive substance. Therefore, the seal member 3
6 does not return in the direction of the opening 34, and the sealing member 36
Does not become an obstacle when trying to take out the tissue paper from the opening 34.

Further, the tissue paper take-out surface 3
No. 2 has a smooth surface, and an adhesive substance can be repeatedly adhered and peeled off. Therefore, when the tissue paper inside the packaging bag 30 has been taken out from the opening 34, the grip portion 38 is peeled from the tissue paper take-out surface 32, the seal member 36 is returned to the original position, and then the back surface thereof is applied. It is also possible to re-bond the sealing member 36 to the tissue paper take-out surface 32 via the first adhesive substance. As a result, it is possible to prevent evaporation of water or other liquid matter in the wet tissue paper sealed inside the packaging bag 30.

After the seal member 36 is adhered to the tissue paper take-out surface 32, the grip portion 38 is adhered again to the seal member 36 to return to the initial state shown in FIG. 1 for the next use. Can be prepared for.

5 to 8 show a second embodiment of the packaging bag according to the present invention. Similarly to the packaging bag 30 according to the first embodiment, the packaging bag 40 according to the second embodiment is also a sealed bag made of a flexible liquid-impermeable plastic film material. The surface of the packaging bag 40 is a smooth surface. Therefore, it is possible to repeatedly attach and detach the adhesive substance to the surface of the packaging bag 40. Inside the packaging bag 40, a plurality of folded wet tissue papers (not shown) are enclosed in a stacked state.

An oval perforation 44 is formed on the tissue paper take-out surface 42, which is the upper surface of the packaging bag 40, and the tissue paper take-out surface 42 is broken along the perforation 44 as will be described later. As a result, the elliptical opening 46 is formed.

A seal member 48 having a larger area than the area inside the perforations 44 (the area to be the opening 46 later) is attached on the tissue paper take-out surface 42. The sealing member 48, like the packaging bag 40,
Made of flexible plastic film material.
A first adhesive material (not shown) is provided on the back surface of the seal member 48.
Is applied over the entire surface, and the seal member 48 is adhered to the tissue paper take-out surface 42 so as to cover the area inside the perforations 44 through the first adhesive substance. The area where the seal member 48 adheres to the tissue paper take-out surface 42 in the area other than the area inside the perforations 44 is A. Further, the sealing member 48 is detached from the tissue paper take-out surface 42 by heat sealing or other means at the end 48A opposite to the end where the grip 50 is provided, as in the first embodiment. It is fixed not to.

A grip portion 50 is formed integrally with the seal member 48 at one end of the seal member 48. The grip portion 50 is formed by folding a portion of a predetermined length outward from one end of the seal member 48. A second adhesive substance (not shown) is applied to the entire back surface of the back surface of the first region 50A which is a half of the folded back portion and includes the folding line. The adhesive material is not applied to the rear surface of the remaining half of the folded-back portion, that is, the back surface of the second area 50B that is the half including the free end of the handle portion 50, and the handle portion 50 is applied to the back surface of the first region 50A. The second region 50B of the grip portion 50, which is held in a state of being adhered to the upper surface of the seal member 48 via the second adhesive substance, which is not coated with the adhesive substance, is different from the first region 50A. It is placed slightly inclined upwards.

The method of using the packaging bag 40 according to the second embodiment will be described below. First, in the state shown in FIG. 5, the second region 50B on the front end side of the handle portion 50 to which the adhesive substance is not applied is grasped. Then, the grip portion 50 is pulled in the direction of the arrow X1 so that the grip portion 50 adhered to the seal member 48 via the second adhesive substance applied to the back surface of the first region 50A is removed from the seal member 48. Peel off from.

In this case, as in the first embodiment, the adhesive force of the grip portion 50 to the seal member 48 is increased by the seal member 48.
In order to make it smaller than the adhesive force to the tissue paper take-out surface 42, each sticky substance and each area are selected so that the following expression is satisfied. F1 × A> F2 × A2 (F1: Adhesive force of the first adhesive substance per unit area F2: Adhesive force of the second adhesive substance per unit area A: Area where the first adhesive substance is applied A2 : Area of the back surface of the first region 50A of the grip portion 50)

As shown in FIG. 6, after the handle portion 50 is completely peeled off from the seal member 48, the handle portion 50 is further removed.
Is pulled in the direction of arrow X2, that is, in the direction of the opposite end of the packaging bag 40.

Since the area inside the perforations 44 is adhered to the back surface of the seal member 48 through the first adhesive substance,
As shown in FIG. 7, the tissue paper take-out surface 42 is broken along the perforations 44 by the pulling of the grip portion 50 in the arrow X2 direction, and the opening 46 is gradually formed.

As shown in FIG. 8, the seal member 48 is pulled until the opening 46 is sufficiently formed to break the tissue paper take-out surface 42 along the perforations 44, and then the first region of the grip portion 50. The grip portion 50 is adhered onto the tissue paper take-out surface 42 via the second adhesive substance applied to the back surface of the 50A.

As a result, as in the case of the first embodiment, the restoring force for the seal member 48 to return to its original position is offset, so that the seal member 48 does not return to its original position, and the seal member 48 does not return to its original position. 48 does not become an obstacle when trying to take out the tissue paper from the opening 46.

When the removal of the tissue paper inside the packaging bag 40 is completed, the seal member 48 is re-bonded to the tissue paper removal surface 42 as in the case of the first embodiment, and the grip portion is further attached. It is possible to re-glue 50 onto the sealing member 48. As a result, it is possible to return to the initial state shown in FIG. 5 and prepare for the next use.

Although the packaging bag according to the present invention has been described with reference to two embodiments, the packaging bag according to the present invention is not limited to these two embodiments and various modifications can be made.

For example, in the second embodiment, the second adhesive substance is applied only to the half region of the handle portion 50 including the folding line, but the area where the second adhesive substance is applied, that is, the first region. The area of 50A is not limited to about half of the handle portion 50. If the second adhesive substance is applied over the length of about 15 to 85% of the entire length of the handle portion 50 including the folding line, it is sufficient to bond the handle portion 50 to the seal member 48.

The area where the second adhesive substance is applied is not limited to the area including the folding line of the handle portion 50. For example, as shown in FIG. 9, of the folded portion, the second adhesive substance is not applied at the first length D1 from the folding line L, and the second adhesive substance is applied only at the next length D2. In addition, the length D including the free end of the handle 50
It is also possible to adopt a configuration in which the second adhesive substance is not applied to 3. Further, it is not always necessary that the first adhesive substance and the second adhesive substance are different substances, and the same substance can be used. When the same substance is used, both adhesive substances have the same adhesive force. Therefore, the area A where the first adhesive substance is applied to the seal members 36 and 48 and the second adhesive substance are grasped. Back side 3 of part 38
8A or the area A2 applied to the back surface of the first region 50A of the handle portion 50 is represented by the following equation. A> A2

For example, in order to satisfy the above equation, the width W (see FIG. 1) of the grip portions 38, 50 is set to the sealing members 36, 4
The width may be narrower than the width of 8.

In the first and second embodiments, the handle portions 38 and 50 are both quadrangular, but the handle portion 3
8 and 50 may have any shape. For example, the shape may be a semicircle, a semi-ellipse, or a triangle.

In the first and second embodiments,
Each seal member is fixed at the end opposite to the end where the handle is provided by heat sealing or other means so as not to come off from the tissue paper take-out surface, but it is not necessarily fixed. The seal member may be detached from the tissue paper take-out surface by pulling the grip portion.

In the first and second embodiments, the packaging bags 30 and 40 are described as containing wet type tissue paper, but the application of the packaging bag according to the present invention is not limited to wet tissue paper. However, the present invention is not limited to the tissue, but can be applied to a dry type tissue paper, and is not limited to the tissue paper, and can be applied to all kinds of wipes and the like. When the packaging bag according to the present invention is applied to a wet type wiping cloth, the packaging bag needs to be made of a liquid impermeable material, but is applied to a dry type wiping cloth. When doing so, such a condition is unnecessary.

[0058]

As described above, in the packaging bag according to the present invention, after pulling the grip portion and peeling the seal member from the tissue paper take-out surface to form the tissue paper take-out surface opening, The sealing member is bonded to the tissue paper taking-out surface at the end of the tissue paper taking-out surface via the second adhesive substance applied to the back surface of the handle portion. For this reason, even if the restoring force that tries to return to the original position acts on the seal member, the seal member remains stuck and cannot move. It is possible to prevent the sealing member from becoming an obstacle when trying to take out the.

[Brief description of drawings]

FIG. 1 is a perspective view of a packaging bag according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the packaging bag according to the first embodiment in a state where the grip portion is peeled off.

FIG. 3 is a perspective view of the packaging bag according to the first embodiment in a state where the seal member is being peeled off.

FIG. 4 is a perspective view of the packaging bag according to the first embodiment in a state where the handle portion is adhered to the end portion of the packaging bag.

FIG. 5 is a perspective view of a packaging bag according to a second embodiment of the present invention.

FIG. 6 is a perspective view of a packaging bag according to a second embodiment in a state where a handle portion is peeled off.

FIG. 7 is a perspective view of the packaging bag according to the second embodiment in a state where the seal member is being peeled off.

FIG. 8 is a perspective view of the packaging bag according to the second embodiment in a state where the handle portion is adhered to the end portion of the packaging bag.

FIG. 9 is a side view of the handle portion showing a region where the adhesive substance is applied to the back surface of the handle portion.

FIG. 10 is a perspective view showing a conventional packaging bag.

[Explanation of symbols]

 10 Conventional packaging bag 12 Tissue paper take-out surface 14 Perforation 16 Opening 18 Sealing member 30 Packaging bag according to the first embodiment 32 Tissue paper taking-out surface 34 Opening 36 Sealing member 38 Handle portion 40 Packaging bag according to the second embodiment 42 Tissue paper take-out surface 44 Perforations 46 Openings 48 Sealing member 50 Handle part 50A First region of handle part 50B Second region of handle part

Claims (8)

[Claims] 1. A packaging bag in which a plurality of sheet materials are enclosed, wherein a sheet material take-out opening formed on the take-out surface of the sheet material and a back surface coated with a first adhesive substance. A seal member that is detachably attached to the take-out surface so as to cover the opening, and a seal member that is attached to the take-out surface; The tip portion of the seal member is formed by being folded back outward in the direction of removing the seal member, and the back surface of the folded portion is coated with a second adhesive substance, and the folded portion is formed. Is a releasable adhesively bonded to the surface of the sealing member. 2. A packaging bag in which a plurality of sheet materials are enclosed, wherein an easily rupturable line for forming an opening for taking out the sheet material is provided in the surface for taking out the sheet material. A first adhesive substance is applied to the back surface of the seal member, the seal member being detachably attached to the take-out surface so as to cover the portion surrounded by the line, and the seal member being removed. A grip portion provided at a side end portion, the grip portion being formed by folding a tip end portion of the seal member outward in a direction of removing the seal member, and a back surface of the folded portion. A second adhesive substance is applied to the packaging bag, and the folded back portion is detachably bonded to the surface of the sealing member. 3. The packaging bag according to claim 1, wherein the handle portion is formed integrally with the seal member. 4. The packaging bag according to claim 1, wherein the second adhesive substance is applied only to a part of the back surface of the handle portion. 5. The packaging bag according to claim 4, wherein the second adhesive substance is applied only to a substantially half region of the back surface of the handle portion including the folding line. 6. The adhesive force of the second adhesive substance to the seal member of the handle portion is smaller than the adhesive force of the first adhesive substance to the take-out surface of the seal member. The packaging bag according to any one of claims 1 to 5, which is characterized. 7. The first adhesive substance and the second adhesive substance are the same substance, and the area of the portion to which the second adhesive substance is applied is the same as the first adhesive substance. The packaging bag according to claim 6, which is smaller than the area of the applied portion. 8. The packaging bag according to claim 1, wherein the sheet material is a wet sheet material, and the packaging bag is made of a liquid impermeable material.